Wrench.



. No. 672,737, Patented Apr. zsflaol.

J. s. MAHANA & A. A. PUMPE.

W R E N C H {Application med Aug. 30, 1 900.)

(No Model.)

'Nrrnn rares JOI-IN B. MAI-IANA AND ADRIAN A. POMPE, OF TOLEDO, WASHINGTON.

WRENCH.

FEFATONibrmng part of Letters Patent N0. 672,737, dated April' 23, 1901.4

Application filed August 30, 1900. Serial No. 28.496. klio modela 1o MZ whom it may concern:

Be it known that we, JOHN B. MAHANA and ADRIAN A. POMPE, citizens of the United States, residing at Toledo, in the county of `Lewis and State of Washington,have invented certain new and useful Improvements in Oombination-Wrenches, of which the following is a specication, reference being had to the accompanying drawings and to the numerals of reference marked thereon.

The object of our invention is to improve the construction of sliding-jaw wrenches and to provide one made entirely of metal havin-g simplicity with increased strength and and not likely to'become disarranged, and

which, further, shall admit of ready and rapid adjustments for the purposes mentioned. The tool is adapted notl only as a wrench, but as a hammer for driving or drawing nails, spikes, dac.

In the accompanying drawings, Figure l is y a longitudinal View, partly in section, showing our invention. Fig. 2 is an edge View, also partlyin section. Fig. 3is an end View. Figs. 4 and 5 are details. Fig. 6 is a modification. i

Similar numerals of reference indicate similar parts in the respective iigures.

The wrench is composed practically of two main pieces, which may be of any suitable length or dimensions, the sheath or tube-like sleeve l carrying the inner jaw 2 and also the handle and the stem or shank 3 carrying the outer jaw 4. The sheath l is provided with a handle 5, the sheath and handle being preferably homogeneous and made of metal. The

` jaw 2 is also by preference integral with the wise shaped to lit to the grasp of the hand. The sheath l is preferably rectangular in cross-section, as shown in Fig. 3, the stem or shank 3 being shaped to fit neatly and slide therein. The jaw 4 may be used as a hammer and may be provided with a claw-slot 6 for the drawing of nails, &c. The jaw or jaws may be shaped to answer other purposes not inconsistent with the performance oaf their main functions as jaws.

The inner edge of the stem or shank 3 is provided with a series of angular teeth or notches 7, preferably about one-eighth of an inch apart, and the opposite edge of the stem is furnished with a slot 8, into which a screw or pin 9, passing through the handle 5, extends, the purpose of the slot 8 and the pin 9 being to limit the sliding movement of the stem or shank 3 within the sheath l. The sheath near the inner portion of the handle 5 has an annular bead or enlargement l0, and a portion of this bead and a part of the sheath proper are cut away or removed to admit of the entrance of two dogs ll lla, which are pivoted uponthe pin 12, as seen particularly in Figs. 2 and 3.

The dogs ll lla are differential in their character in the sense that they engage different notches 7 of the shank 3, so that the end movement of the stem or shank 3 may bc practically limited to one-sixteenth of an inch or one-half the distance between the notches. Each of the dogs l1 lla has at its operative end a knife edge or point adapted to fit the notches,while at the opposite side of the pivot each dog is furnished with a lug 13, under which the end of the spring 14 fits, the normal tendency of which spring is to force its dog into engagement with the notches 7 of the stem or shank 3. The springs are represented by 15, being attached by screws or other devices 16 to the sheath l, as shown. Each of the dogs has an enlargement or thu mbpiece 17 at or near its pivot for convenience in disconnecting the dog from the notch with which it is engaged. The dogs may be conveniently removed for the purpose of repair or resharpening, and the notches 7 may be easily reiiled when necessary.

We do not confine ourselves to the use of differential dogs, as one dog may be used if IOO a less accurate adj ustment issatisfactory, and in Fig.4 6 a modification is shown in which the differential dogs are solid, being operated upon by but one spring, whereby a double hold is obtained upon the notches.

In wrenches in ordinary use the handle is on the stem or shank, and the inner jaw is adj usted back and forth generally by a screw, and, as will be seen, in such wrenches the longest leverage is found when, the tool is applied to the smallest object, and when the jaws are widest apart the extent of leverage is the least. In our invention the conditions are reversed, for by connecting the inner jaw rand handle the leverage becomes adjustable,

being greater as the sizeof the object grasped increases. y

In Figs; 4 and 5 the tool is shown adapted for use as a pipe-wrench. Here the jaws 2 and 4 are provided with removable sections 18 18a, respectively, attached to the jaws by screws 19 19a. The sections 18 18a may be of any suitable conformation and are intended to be conveniently applied to and removed from the tool.

The jaw 4 is rounded upon its exterior, as shown at 20, and rat the claw-slot 6 is a depression 21. The rounded conformation of the jaw 4 and the peculiar construction and arrangement of the claw-slot 6 are such as to give the tool great facility in drawing nails and the like.

We do not limit ourselves to any special means for uniting the sections 18 18aL to the respective jaws of the tool, any suitable and convenient means of attachment being within the scope of our improvement.

It is obvious that various minor changes in construction and arrangement may be made in this tool without the exercise of invention, and such unimportant departures from what is herein generally described are intended to be within the terms of our claim.

Having thus Adescribed our invention, we claim- In a wrench, the combination of a handle and sheath, carrying an inner jaw, a notched stem or shank sliding within said sheath and carrying the outer jaw, the retaining-dogs 1l, Il, each having the lugs 13 and enlargements 17, and the springs 14 for engaging the dogs, the said springs being secured to the outside of the sheath, substantially as set forth.

In testimony whereof We hereunto set our hands.

' JOHN B. MAHANA.

ADRIAN A. POMPE. Witnesses:

E. F. CARPENTER, BETsEY SHERMAN. 

